Journal of Engineering Sciences / Журнал інженерних наук
Permanent URI for this collectionhttps://devessuir.sumdu.edu.ua/handle/123456789/34326
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Item Design and manufacturing of polymer composite materials using quality management methods(Sumy State University, 2023) Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Mitalova, Z.; Павленко, Іван Володимирович; Павленко, Иван Владимирович; Pavlenko, Ivan Volodymyrovych; Trojanowska, J.; Іванов, Віталій Олександрович; Иванов, Виталий Александрович; Ivanov, Vitalii Oleksandrovych; Руденко, Павло Володимирович; Руденко, Павел Владимирович; Rudenko, Pavlo VolodymyrovychMany factors influence the design and manufacturing of products from polymer composite materials. The expert assessment method was applied in the article for the corresponding analysis. A cause-and-effect diagram was built as a result of a preliminary analysis of the influence of factors on the primary indicator of product quality indicators (e.g., wear resistance). Based on the expert assessment results and quality function deployment analysis, the most critical factors affecting wear resistance were obtained: polymer brand, filler shape and size, technological parameters of mixing, pressing, sintering, and mechanical processing. Their impact was studied to establish quantitative dependencies. A stable value of the wear resistance of the product in the manufacturing process can be ensured by timely adjustment of the mixing, pressing, and sintering modes. As a result of the structural analysis of the process of developing materials with predetermined properties at the enterprise according to the IDEF0 methodology, the importance of assessing the risks associated with the process of multi-criteria optimization of their main quality indicators was confirmed.Item Application of FMEA for assessment of the polymer composite materials quality(Sumy State University, 2021) Rudenko, S.; Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Trojanowska, J.; Varenyk, S.; Shvetsov, D.; Kravets, V.The paper is devoted to developing a methodology for failure mode and effects analysis on the example of assessment of defects that occur during production and operation of polymer composite materials and industrial products from them. The paper uses the Ishikawa method to illustrate and further analyze the cause of defects in reinforced polymer composite material. The Ishikawa diagram was constructed and analyzed using the method of causal analysis. The types and consequences of failures and defects for polymer composite materials are analyzed. For each type of defect, the value of the priority number of risks is calculated. For the most critical defect, measures to reduce potential defects are proposed. Suggestions for improving the detected defective zones in the structures of polymer composites in the analysis process are given.Item Application of Reinforcing Thermocycling Treatment for Materials of Stamps Hot Deformation(Sumy State University, 2019) Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Говорун, Тетяна Павлівна; Говорун, Татьяна Павловна; Hovorun, Tetiana Pavlivna; Bondarenko, M.; Vorobiov, S.Стаття присвячена пошуку технологічних методів підвищення стійкості штампового інструмента для гарячого деформування. У результаті дослідження були розроблені нові, нестандартні сполучення схем циклування і параметрів термоциклічного оброблення (ТЦО) у межах режиму. Це дозволило створити в металі керовані структурні стани за рахунок подрібнення зерна, створення підвищеної щільності дефектів і прискорення дифузійних процесів з метою ефективного управління структурою, підвищення механічних, експлуатаційних властивостей та запобігання руйнуванню робочих поверхонь інструмента. Розроблено і випробувано нові режими ТЦО, які позитивно впливають на механічні характеристики сталі 5ХНМ. Проведене термічне оброблення відповідно до експериментальних режимів, що складалось із попереднього термоциклічного оброблення з послідуючими гартуванням і відпуском, дозволяє отримати більш однорідну структуру металу із збереженням дрібного зерна і заданої твердості. Розмір зерна структури сталі 5ХНМ після використання термоциклічного оброблення зменшується з 5–6 до 7–8 балів, а після остаточного термічного оброблення – до 9–10 балів.Item Mathematical Modeling of the Mechanical Characteristic of the Activated PTFE-Matrix Using the Method of Planning the Experiment(Sumy State University, 2018) Білоус, Олена Анатоліївна; Белоус, Елена Анатольевна; Bilous, Olena Anatoliivna; Говорун, Тетяна Павлівна; Говорун, Татьяна Павловна; Hovorun, Tetiana Pavlivna; Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Vorobiov, S.I.; Simkulet, V.V.In this paper, the influence of the parameters of the technological process of mechanical activation on the physical characteristics of the polytetrafluoroethylene (PTFE) matrix is investigated. The paper presents a mathematical model of the dependence of breaking strength on the time of activation and rotating speed of working organs of a mill. Mathematical modeling is performed by the method of orthogonal experiment planning. The result of the study was a mathematical relation that explains the connection between the technical characteristics of the process of manufacturing a fluoroplastic composite and the mechanical characteristics of the material. The statistical analysis of the experimental results is performed and the adequacy of the mathematical relations obtained is estimated. On the basis of the analysis of the obtained data, it can be concluded that the theoretical model obtained is adequate and suitable for performing the corresponding technological calculations. On the basis of the performed calculations, the conclusion is reached on the optimal technological mode of preparing the PTFE-matrix. The analysis shows that theoretical calculations confirm the experimental value of technological indicators under optimal operating conditions of the mill. Thus, the obtained dependence of breaking strength from the technological parameters of the activation process can be embedded in the algorithm for selecting the technological mode that ensures the output of products with specified quality indicators.Item Modern materials for automotive industry(Sumy State University, 2017) Говорун, Тетяна Павлівна; Говорун, Татьяна Павловна; Hovorun, Tetiana Pavlivna; Берладір, Христина Володимирівна; Берладир, Кристина Владимировна; Berladir, Khrystyna Volodymyrivna; Pererva, V.I.; Rudenko, S.G.; Martynov, A.I.The car industry uses a tremendous number of materials to build cars, including iron, aluminum, steel, glass, rubber, petroleum products, copper, steel and others. These materials have evolved greatly over the decades, becoming more sophisticated, better built, and safer. They've changed as new automotive manufacturing technologies have emerged over the years, and they're used in increasingly innovative ways. This article is devoted to systematization information on the introduction and application of modern materials in the automotive industry. Given both domestic and foreign sources of information, it follows that car manufacturers are constantly pushing to create the lightest cars possible to increase speed and power. Research and development into lightweight materials is essential for lowering their cost, increasing their ability to be recycled, enabling their integration into vehicles, and maximizing their fuel economy benefits. Light weighting without loss of strength and speed properties is the present, and the future, of the automotive manufacturing industry. It brings innovative materials to the frontline of design.